| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8143628 |
| * @summary Test unsafe access for float |
| * |
| * @modules java.base/jdk.internal.misc:+open |
| * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat |
| * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat |
| * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat |
| * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat |
| */ |
| |
| package compiler.unsafe; |
| |
| import org.testng.annotations.Test; |
| |
| import java.lang.reflect.Field; |
| |
| import static org.testng.Assert.*; |
| |
| public class JdkInternalMiscUnsafeAccessTestFloat { |
| static final int ITERS = Integer.getInteger("iters", 1); |
| static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10); |
| |
| static final jdk.internal.misc.Unsafe UNSAFE; |
| |
| static final long V_OFFSET; |
| |
| static final Object STATIC_V_BASE; |
| |
| static final long STATIC_V_OFFSET; |
| |
| static int ARRAY_OFFSET; |
| |
| static int ARRAY_SHIFT; |
| |
| static { |
| try { |
| Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
| f.setAccessible(true); |
| UNSAFE = (jdk.internal.misc.Unsafe) f.get(null); |
| } catch (Exception e) { |
| throw new RuntimeException("Unable to get Unsafe instance.", e); |
| } |
| |
| try { |
| Field staticVField = JdkInternalMiscUnsafeAccessTestFloat.class.getDeclaredField("static_v"); |
| STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField); |
| STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| |
| try { |
| Field vField = JdkInternalMiscUnsafeAccessTestFloat.class.getDeclaredField("v"); |
| V_OFFSET = UNSAFE.objectFieldOffset(vField); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| |
| ARRAY_OFFSET = UNSAFE.arrayBaseOffset(float[].class); |
| int ascale = UNSAFE.arrayIndexScale(float[].class); |
| ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); |
| } |
| |
| static float static_v; |
| |
| float v; |
| |
| @Test |
| public void testFieldInstance() { |
| JdkInternalMiscUnsafeAccessTestFloat t = new JdkInternalMiscUnsafeAccessTestFloat(); |
| for (int c = 0; c < ITERS; c++) { |
| testAccess(t, V_OFFSET); |
| } |
| } |
| |
| @Test |
| public void testFieldStatic() { |
| for (int c = 0; c < ITERS; c++) { |
| testAccess(STATIC_V_BASE, STATIC_V_OFFSET); |
| } |
| } |
| |
| @Test |
| public void testArray() { |
| float[] array = new float[10]; |
| for (int c = 0; c < ITERS; c++) { |
| for (int i = 0; i < array.length; i++) { |
| testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET); |
| } |
| } |
| } |
| |
| @Test |
| public void testArrayOffHeap() { |
| int size = 10; |
| long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); |
| try { |
| for (int c = 0; c < ITERS; c++) { |
| for (int i = 0; i < size; i++) { |
| testAccess(null, (((long) i) << ARRAY_SHIFT) + address); |
| } |
| } |
| } finally { |
| UNSAFE.freeMemory(address); |
| } |
| } |
| |
| @Test |
| public void testArrayOffHeapDirect() { |
| int size = 10; |
| long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); |
| try { |
| for (int c = 0; c < ITERS; c++) { |
| for (int i = 0; i < size; i++) { |
| testAccess((((long) i) << ARRAY_SHIFT) + address); |
| } |
| } |
| } finally { |
| UNSAFE.freeMemory(address); |
| } |
| } |
| |
| static void testAccess(Object base, long offset) { |
| // Plain |
| { |
| UNSAFE.putFloat(base, offset, 1.0f); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "set float value"); |
| } |
| |
| // Volatile |
| { |
| UNSAFE.putFloatVolatile(base, offset, 2.0f); |
| float x = UNSAFE.getFloatVolatile(base, offset); |
| assertEquals(x, 2.0f, "putVolatile float value"); |
| } |
| |
| |
| // Lazy |
| { |
| UNSAFE.putFloatRelease(base, offset, 1.0f); |
| float x = UNSAFE.getFloatAcquire(base, offset); |
| assertEquals(x, 1.0f, "putRelease float value"); |
| } |
| |
| // Opaque |
| { |
| UNSAFE.putFloatOpaque(base, offset, 2.0f); |
| float x = UNSAFE.getFloatOpaque(base, offset); |
| assertEquals(x, 2.0f, "putOpaque float value"); |
| } |
| |
| |
| UNSAFE.putFloat(base, offset, 1.0f); |
| |
| // Compare |
| { |
| boolean r = UNSAFE.compareAndSwapFloat(base, offset, 1.0f, 2.0f); |
| assertEquals(r, true, "success compareAndSwap float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 2.0f, "success compareAndSwap float value"); |
| } |
| |
| { |
| boolean r = UNSAFE.compareAndSwapFloat(base, offset, 1.0f, 3.0f); |
| assertEquals(r, false, "failing compareAndSwap float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 2.0f, "failing compareAndSwap float value"); |
| } |
| |
| // Advanced compare |
| { |
| float r = UNSAFE.compareAndExchangeFloatVolatile(base, offset, 2.0f, 1.0f); |
| assertEquals(r, 2.0f, "success compareAndExchangeVolatile float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "success compareAndExchangeVolatile float value"); |
| } |
| |
| { |
| float r = UNSAFE.compareAndExchangeFloatVolatile(base, offset, 2.0f, 3.0f); |
| assertEquals(r, 1.0f, "failing compareAndExchangeVolatile float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "failing compareAndExchangeVolatile float value"); |
| } |
| |
| { |
| float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 2.0f); |
| assertEquals(r, 1.0f, "success compareAndExchangeAcquire float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 2.0f, "success compareAndExchangeAcquire float value"); |
| } |
| |
| { |
| float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 3.0f); |
| assertEquals(r, 2.0f, "failing compareAndExchangeAcquire float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 2.0f, "failing compareAndExchangeAcquire float value"); |
| } |
| |
| { |
| float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 1.0f); |
| assertEquals(r, 2.0f, "success compareAndExchangeRelease float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "success compareAndExchangeRelease float value"); |
| } |
| |
| { |
| float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 3.0f); |
| assertEquals(r, 1.0f, "failing compareAndExchangeRelease float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "failing compareAndExchangeRelease float value"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSwapFloat(base, offset, 1.0f, 2.0f); |
| } |
| assertEquals(success, true, "weakCompareAndSwap float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 2.0f, "weakCompareAndSwap float value"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSwapFloatAcquire(base, offset, 2.0f, 1.0f); |
| } |
| assertEquals(success, true, "weakCompareAndSwapAcquire float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "weakCompareAndSwapAcquire float"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSwapFloatRelease(base, offset, 1.0f, 2.0f); |
| } |
| assertEquals(success, true, "weakCompareAndSwapRelease float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 2.0f, "weakCompareAndSwapRelease float"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSwapFloatVolatile(base, offset, 2.0f, 1.0f); |
| } |
| assertEquals(success, true, "weakCompareAndSwapVolatile float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "weakCompareAndSwapVolatile float"); |
| } |
| |
| UNSAFE.putFloat(base, offset, 2.0f); |
| |
| // Compare set and get |
| { |
| float o = UNSAFE.getAndSetFloat(base, offset, 1.0f); |
| assertEquals(o, 2.0f, "getAndSet float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, 1.0f, "getAndSet float value"); |
| } |
| |
| UNSAFE.putFloat(base, offset, 1.0f); |
| |
| // get and add, add and get |
| { |
| float o = UNSAFE.getAndAddFloat(base, offset, 2.0f); |
| assertEquals(o, 1.0f, "getAndAdd float"); |
| float x = UNSAFE.getFloat(base, offset); |
| assertEquals(x, (float)(1.0f + 2.0f), "getAndAdd float"); |
| } |
| } |
| |
| static void testAccess(long address) { |
| // Plain |
| { |
| UNSAFE.putFloat(address, 1.0f); |
| float x = UNSAFE.getFloat(address); |
| assertEquals(x, 1.0f, "set float value"); |
| } |
| } |
| } |
| |